code: def test_zernike_cm():
      A = (np.arange(256) % 14).reshape((16, 16))
      cm = (8.9, 12.4)
      slow = _slow_zernike(A, 8.0, 12, cm)
      fast = zernike_moments(A, 8.0, 12, cm=cm)
      delta = np.array(slow) - fast
      assert np.abs(delta).max() < 0.001
  
file_path: mahotas/mahotas/tests/test_zernike.py
imports: import numpy
  from mahotas.features import zernike_moments
  from mahotas.center_of_mass import center_of_mass
  import mahotas
  from math import atan2, ceil
  from numpy import cos, sin, conjugate, pi, sqrt
label_desc: Use image node_id 4 for calling a global function with example usage: test_zernike_cm() without return types